BIO CDC VOL 2- Test Questions &
Answers
(231) What type of survey is used to classify whether a particular piece of noise-producing
equipment exceeds the criterion level of 85 A-weighted decibels (dB[A]) and could present a
potential exposure hazard to workers? Correct Ans-Noise source
(232) What sound level meter response time would you select to determine the average noise
levels for industrial type operations and when taking Occupational Safety and Health
Administration (OSHA) compliance measurements? Correct Ans-Slow
(232) When performing a noise source survey, at what weighting and response time should you
set your sound level meter? Correct Ans-A-weighting, slow response
(232) What environmental factors may affect the performance of noise measurement instruments
and their readings? Correct Ans-Temperature, humidity, atmospheric pressure, and magnetic
fields
(232) At what angle to the sound source must you hold a random incidence microphone when
collecting sound level readings? Correct Ans-70 degrees
(233) What can be used to evaluate the whole body effects of sound? Correct Ans-An octave
band analysis
, (233) What parameters must you set the octave band analyzer before performing the octave band
survey? Correct Ans-Z-weighting, fast, sound pressure level (SPL)
(233) How often are audiometric test booths monitored when all measurements taken are within
the Air Force (AF) criteria? Correct Ans-Annually
(234) At what exchange rate in decibels (dB) should a noise dosimeter be set for measurements
to be compared to Air Force (AF) standards? Correct Ans-3 dB
(234) Which is the conversion needed by noise dosimeters that indicate the daily dose as a
percentage? Correct Ans-Daily equivalent sound level
(235) What type of noise control should be considered first? Correct Ans-Source
(235) What type of machine treatment control at the source is the most direct method used to
reduce noise hazards associated with equipment vibration? Correct Ans-Reduce the driving
force
(236) How is attenuation estimated to combine the noise reduction rating (NRR) for earplugs and
earmuffs worn together? Correct Ans-Add 3 dB to the highest NRR of the plug or earmuff
(237) What occupational illness gradually develops from chronic exposure to poor ergonomic
conditions in the workplace? Correct Ans-Work-related musculoskeletal disorder (WMSD)
Answers
(231) What type of survey is used to classify whether a particular piece of noise-producing
equipment exceeds the criterion level of 85 A-weighted decibels (dB[A]) and could present a
potential exposure hazard to workers? Correct Ans-Noise source
(232) What sound level meter response time would you select to determine the average noise
levels for industrial type operations and when taking Occupational Safety and Health
Administration (OSHA) compliance measurements? Correct Ans-Slow
(232) When performing a noise source survey, at what weighting and response time should you
set your sound level meter? Correct Ans-A-weighting, slow response
(232) What environmental factors may affect the performance of noise measurement instruments
and their readings? Correct Ans-Temperature, humidity, atmospheric pressure, and magnetic
fields
(232) At what angle to the sound source must you hold a random incidence microphone when
collecting sound level readings? Correct Ans-70 degrees
(233) What can be used to evaluate the whole body effects of sound? Correct Ans-An octave
band analysis
, (233) What parameters must you set the octave band analyzer before performing the octave band
survey? Correct Ans-Z-weighting, fast, sound pressure level (SPL)
(233) How often are audiometric test booths monitored when all measurements taken are within
the Air Force (AF) criteria? Correct Ans-Annually
(234) At what exchange rate in decibels (dB) should a noise dosimeter be set for measurements
to be compared to Air Force (AF) standards? Correct Ans-3 dB
(234) Which is the conversion needed by noise dosimeters that indicate the daily dose as a
percentage? Correct Ans-Daily equivalent sound level
(235) What type of noise control should be considered first? Correct Ans-Source
(235) What type of machine treatment control at the source is the most direct method used to
reduce noise hazards associated with equipment vibration? Correct Ans-Reduce the driving
force
(236) How is attenuation estimated to combine the noise reduction rating (NRR) for earplugs and
earmuffs worn together? Correct Ans-Add 3 dB to the highest NRR of the plug or earmuff
(237) What occupational illness gradually develops from chronic exposure to poor ergonomic
conditions in the workplace? Correct Ans-Work-related musculoskeletal disorder (WMSD)
